In our custom board we are using kitkat 4.4.3 and we are not able to keep the device in standby mode. After time out its going to suspend mode.
we tried below command
root@evk_6sl:echo standby > /sys/power/state
request_suspend_state: sleep (0->2) at 4294590241719 (2018-03-26 08:25:44.738594988 UTC)
active wake lock PowerManagerService.WakeLocks
active wake lock PowerManagerService.Display
After time out its going to suspend mode log info :
request_suspend_state: sleep (2->3) at 4424867285277 (2018-03-26 08:27:55.015637837 UTC)
PM: suspend entry 2018-03-26 08:27:55.206006462 UTC
Freezing user space processes ... (elapsed 0.001 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
Do you have any suggestion in this case?